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| Development of prenatal ultrasound diagnosis and risk prediction for pernicious previa with placental implantation |
| Gansu Provincial Maternity and Child Health Care Hospital, Lanzhou, Gansu Province, 730050 |
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Abstract Pernicious placenta previa (PPP) combined with placental implantation can lead to serious obstetric complications, and it is very important for prenatal diagnosis of PPP combined with placenta implantation. Ultrasound is currently recognized as the preferred method for diagnosing placental implantation. Some studies have shown that different ultrasound signs have different sensitivities and specificities, and comprehensive evaluation can improve the diagnostic rate of placenta implantation. Base on the position of the placenta , placental thickness, placental hypoechoic band, bladder wall continuity, placental lacuna, placental basal blood flow signal, cervical morphology and cervix sinus by ultrasound, and combined with previous cesarean section history of patients, etc, the scores can be received and can be used for evaluating the type of placental implantation and predict bleeding risk. The higher the scores are, the more severe the placental implantation is. In summary, prenatal ultrasound diagnosis of the type of placental implantation and prediction of bleeding risk has high accuracy and important clinical guiding value.
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